compositions



106. comPosmows,

comma oai'usnc UNITED STATES GEORG BUOIINER, OF MUNICH, ASSIGNOR TOMAX MAY, OF MINDELIIEIM,

Cross Reference Examine PATENT OFFICE.

GERMANY.

, ARTIFICIAL STONE.

SPECIFICATION forming part of Letters Patent No. 443,250, dated December 23, 1890.

Application filed February 17, 1890- To all whom it may concern.-

Be it known that I, GEORG BUCHNER, of Munich, Bavaria, Germany, have invented a new and useful Improvement in Artificial Stone, of which the following is a specification.

This invention relates to a new composition for imitating marble, granite, syenite, malachite, or similar stones.

In carrying out my invention sawdust or an equivalent body is mixed wit a binding material, pressed into forms, and is then dried, polished, or planed.

The binding material I employ is composed :5 of the following ingredients: one hundred to one hundred and fifty parts caseine; ten to twenty parts g ycerine; ten to wenty art-s water-"l fi ty to sixtyparts mixture (5L2- ;W' (100) and magnesia (l0); five to ten parts oil, preferably linseed-oil.

The mixture of hydrate of lime and magnesia can be replaced by the following equivalent mixtures: mixture of bar *trim and magnesia mixture of SillOlltlllm and ma nesia,

mixture of hydrate of lime and hydrate of bar ta.

e above-described binding material renders the product elastic, translucent, and wator-proof. If greater elasticity is desired, more this somresmfilaiteaadea. Of course the Serial No. 340,774. (No specimens.)

oil and glycerine are added, while for greater o hardness more water-glass and magnesia are added.

The sawdust, before being mixed with the binding material, is soaked in water containing a little glycerine. In this soft form it is 5 mixed, and then the mass is put into molds, a messed into the desired shape, and dried under 20 to centigrade. It is theni'eady to be polished. If desired, the artificial stone when completed may he provided with a top 0 i coating of wax, cerine, or a mixture ofingflfi fine el di n m to indsets water; To

sawdust may be dyed, and some coloring-matteriiiay behhi'xethinto the binding mass.

WhatI claim is- A composition to imitate stone, and consisting of sawdust, caseine, glycerine, waterglass, hydrate of lime, magnesia, and oil, substantially as specified.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

. GEORG BI'CHNER.

Witnesses:

W. CUIKMAN, N. SEYER. 

